$NetBSD$

--- src/port_scan/strerror.c.orig	2004-01-30 04:14:21.000000000 +0000
+++ src/port_scan/strerror.c
@@ -7,8 +7,7 @@
   * Author: Wietse Venema.
   */
 
-extern char *sys_errlist[];
-extern int sys_nerr;
+#include <errno.h>
 
 char   *strerror(err)
 int     err;
